[CentOS] Eggcups printer icon not showing up in panel

I did a "side grade" on a client's machine freom FC2 to Centos4.2. I am not seeing the eggcups printer icon appear when the user sends a print job.

One problem was that I had to copy /etc/X11/xdm/Xsession.rpmnew into place so that the DBUS_SESSION_BUS_ADDRESS variable got set correctly.

The messagebus service is running, as well as hal. There is a notification area in the panel. I can manually start eggcups and not get an error. (It returns 0). But it immediately exits, and no printer icon.

Am I missing something? I'm not particularly familiar with eggcups and its required configs.

Thanks for any help, Steve Bergman